2646551 has 2 divisors, whose sum is σ = 2646552. Its totient is φ = 2646550.

The previous prime is 2646533. The next prime is 2646571. The reversal of 2646551 is 1556462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2646551 - 2¹⁰ = 2645527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2646571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323275 + 1323276.

It is an arithmetic number, because the mean of its divisors is an integer number (1323276).

2^2646551 is an apocalyptic number.

2646551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646551 is an equidigital number, since it uses as much as digits as its factorization.

2646551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 2646551 is about 1626.8223627674. The cubic root of 2646551 is about 138.3226888150.

The spelling of 2646551 in words is "two million, six hundred forty-six thousand, five hundred fifty-one".